Adjusting device and burglar alarm for casement windows



Dec. 26, 1933. R. F. PRATER 1,940,770

ADJUSTING DEVICE AND BURGLAR ALARM FOR CASEMENT WINDOWS Filed April 6, 19 3s .2 sheets-sheet 1 Inventor 1 5. Ffrafgr R. F. PRATER Dec. 26, 1933.

ADJUSTING DEVICE AND BURGLAR ALARM FOR CASEMENT WINDOWS Filed April 6, 1 2 She ets-Sheet 2 4 MM /1 4 M 7, 4 m z 4 flllorney Patented Dec. 26, 1933' v Robert 1 Prater,'Atlanta, Ga. Application April 6, 1933. Serial No. 664,837

2 Claims.

This invention relates to an adjuster and burglar alarm for casement windows, the general object of the invention being to provide means for holding the window in locked or closed position while permitting it to be opened to different degrees, withmeans for sounding an alarm when an attempt is made to open the window to gain access to the building.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to, be hereinafter fully described, illustrated in the accompanying drawings al'ldBDGCiflCiillY pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a top plan View showing the invention in use on a casement window, with the window in closed position.

Figure 2 is a vertical sectional view through the latching part of the device.

I Figure 3 is a bottom plan .view of the pivoted end of the device. V

Figure 4 is a longitudinal sectional view through Figure 3. 5

Figure 5 is a transverse sectional view through the device.

In these drawings, the letter A indicates a part of the window frame which includes the stool or sill a and the hinged sash B.

In carrying out my invention, I provide an elongated casing 1 which is pivoted at one end to a base plate 2 fastened to the sill, the pivot screw being shown at 3. The casing is provided with a removable bottom plate 1'. A rod 4 is slidably arranged in the casing and passes from the free end thereof and is pivoted to a bracket 5 attached to the sash B so that as the sash swings outwardly, the casing 1 will swing on'the pivot ,3 and the rod 4 will move outwardly from the casing. A small casing 6 is formed on the outer end of the casing 1 and the handle 7 of a latch member '8 passes through the small casing 6 and is pivoted therein, as shown at 9. The head of the latch member 8 is formed with a depending yoke-shaped part 10 through which the rod 4 passes and a projection 11 is formed on the night of the yoke for engaging a recess in a keeper member 12 fastened to the sill a, the parts being so arranged that when the sash is in closed position, the projection 11 will engage the recess of the keeper member and thus the sash will be i locked in closed position.

A depending projection 13 is formed, on the a under face of the head 8 and is adapted to engage any one of a number of holes 14 in the bar 4 to hold said bar in adjusted position so that by vadjusting the bar 4 and then locking it in adjusted position by the projection 13 on the latch member, the window will be held open to any desired extent from 90 to various degrees'between 6 the 99 and the fully closed position. I A spring 15 tends to hold the latch member in operative position, as shown in Figure 2, and a spring pressed button 16 is partly located in a recess in the top of the casing l and is engaged by a projection 17 on the lower face of the handle 7, when the'latch member is moved downwardly to free the projections 11 and 13 from the keeper member and the bar 4 and when the button'is depressed, it will bridge the wires 18 which are electrically connected to an alarm, so that the alarm will be sounded when the latch member is moved to releasing position. These wires extend A stop projection 21 depends from the inner end of the rod 4 and operates in an elongated slot 19 in the bottom plate 1 of the casing l. Said slot has its ends closed and the stop projection engaging said ends limits sliding movement of the rod.

From the foregoing it will be seen that I have provided simple means for locking a casement window sash in closed position and for holding it in various open positions, with means for sounding an alarm when the latch member is moved toreleasing position, so that an unauthorized person cannot enter the window without the alarm notifying persons within the building or elsewhere that an attempt is being made to open the window.

' It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is'to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is:-

1. In combination with a casement window and its sash, an elongated member pivotally connected to a part of the window frame, a bar slidably arranged in said member, a bracket on the sash to which the bar is pivoted, a recessed keeper member on the same'part of 'the frame and a latch member having an opening therein through which the bar passes, a projection on the latch memarranged in the member and having its outer end pivoted to the bracket, a latch member pivoted to the elongated member and having a depending yoke thereon through which the bar passes, a depending projection on the latch member extending into the space formed by the yoke for engaging any one of the holes in the bar, the bight of the yoke having a projection thereon, and a keeper member fastened to the same part of the frame and having a recess therein for receiving the second projection to hold the sash locked in closed position. 7

- v ROBERT F. PRATER. 

